Hi,
I've configured SCUP 2011, synced with SCCM 2012R2 and tested it's working successfully for other third party software updates deployment.
It's working fine for Adobe Flash player but receiving "Error: Invalid Certificate Signature" while downloading the Adobe Reader Acrobat Reader DC updates for (Ver. 15.xxx.xxxxx to 18.xxx.xxxxx) to deploy.
Kindly let us know if there is any issue with Adobe certificate itself and assist to resolve this issue.
Thanks.
Sone